Question

List three reasons why we need oxygen​

Answer 1

Answer:

They should understand the following macroscopic and microscopic processes:

lungs take in oxygen for the combustion of food and they eliminate the carbon dioxide produced; the urinary system disposes of dissolved waste molecules;

the intestinal tract removes solid wastes;

the skin and lungs rid the body of heat energy; ...

Answer 2

Answer:

1.Oxygen is used to respiration.

2.We acquire oxygen from outside the body and use it in the breakdown of food for cellular needs. ...

3.Oxygen is the only type of air that keeps us alive.